DIRECTIONAL VALVES
DESCRIPTION
A screw-in, cartridge-style, hydraulic check valve for use as a blocking or load-holding
device.
OPERATION
The CV12-20 allows fl ow passage from ➀ to ➁, while normally blocking oil fl ow in the
opposite direction.
The cartridge has a fully guided check which is spring-biased closed until suffi cient
pressure is applied at
➀ to open to ➁.
FEATURES
• Hardened seat for long life and low leakage.
• Optional bias springs for back-pressure application fl exibility.
• Fully guided check assembly.
• Cost effective cavity.
RATINGS
Operating Pressure: 240 bar (3500 psi)
Proof Pressure: 420 bar (6090 psi)
Flow: See Performance Chart
Internal Leakage: 0.25 cc/minute (5 drops/minute) max. at 240 bar (3500 psi)
Crack Pressure Defi ned: Gauge bar (psi) evident at
➀ at 16.4 cc/minute
(1 cu. in./minute) attained
Standard Bias Springs at Crack: 0.34 bar (5 psi); 1.7 bar (25 psi); 4.1 bar (60 psi)
Temperature: -40 to 120°C
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC12-2; See page 9.112.1
Cavity Tool: CT12-2XX; See page 8.600.1
Seal Kit: SK12-2X-T; See page 8.650.1
CV12-20 Check Valve
USASI: ISO:
PERFORMANCE (Cartridge Only)
SYMBOLS
4.013.1
5.5/80
4.1/60
2.8/40
1.4/20
18.9
5
37.9
10
56.8
15
FLOW lpm/gpm
PRESSURE DROP bar/psi
➀ to ➁
32 cSt/150 ssu oil at 40°C
75.8
20
94.6
25
0.34 bar/5 psi spring
2.1 bar/30 psi spring
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CV12-20 - __ __ __ - __ - __ __
Cartridge: Weight: 0.18 kg. (0.40 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Standard Ported Body: Weight:
0.57 kg. (1.25 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.012.1
MATERIALS
TO ORDER
Seals
N Buna N (Std.)
V Fluorocarbon
Bias Spring*
5 0.34 bar (5 psi)
25 1.7 bar (25 psi)
30 2.1 bar (30 psi)
60 4.1 bar (60 psi)
Porting
Cartridge Only 0
SAE 10 10T
SAE 12 12T
SAE 16 16T
CV12-20
4.013.2
DIMENSIONS
*Additional springs in development;
Consult factory.
®
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